TABLE 1.

Results from 29 patients with active pulmonary TB determined by AFB smear microcopy, culture, and the QuantiFERON-TB Gold assay

QuantiFERON-TB Gold resultNo. of patients with test result by:
AFB smear microscopyCulture
PositiveNegativeTotalPositiveNegativeTotal
Positivea121325b18725b
Negative404404
Total16b132922b729
  • a Positive IFN-γ levels of ≥0.20 IU/ml defined by ROC curve analysis.

  • b Differences in sensitivity between QuantiFERON-TB Gold and microscopy or culture were calculated using the McNemar test. A P value of <0.05 was considered to be significant.